--- product_id: 592092482 title: "Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10" price: "€ 338.96" currency: EUR in_stock: true reviews_count: 12 url: https://www.desertcart.pt/products/592092482-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0 store_origin: PT region: Portugal --- # 0.71x focal length reduction 1-stop aperture increase for brighter shots Metal mount with dust & water resistance Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 **Price:** € 338.96 **Availability:** ✅ In Stock ## Summary > 📸 Elevate your Canon EF lenses to pro-level brilliance with Meike’s Speed Booster! ## Quick Answers - **What is this?** Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - **How much does it cost?** € 338.96 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/592092482-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Precision Fit:** Adjustable gasket ensures perfect focus alignment for flawless image quality. - • **Reclaim Your Field of View:** 0.71x focal reduction recovers crop factor, giving you wider, more immersive shots. - • **Unlock Pro-Level Brightness:** Boost your lens aperture by 1 stop for stunning low-light and bokeh effects. - • **Rugged & Ready for Adventure:** Durable metal construction with dust and water resistance keeps you shooting anywhere. - • **Seamless Autofocus & Stabilization:** Full electronic contacts support EF lens autofocus and vibration compensation. ## Overview The Meike EFTR-0.71X Speed Booster is a precision lens mount adapter designed for Canon EF lenses to APS-C Canon RF mount cameras like EOS R7 and R10. It reduces focal length by 0.71x while increasing aperture by 1 stop, enhancing brightness and field of view. Featuring full electronic contacts, it supports autofocus and image stabilization. Built with durable metal and dust/water resistance, it’s lightweight (166g) and includes an adjustable gasket for perfect focus calibration. ## Description Buy Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10: Adapters & Converters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Very nice speedring - Works very well. Gets most of your crop factor back and adds a stop to your lenses. Only issue is camera complains about it not being a standard accessory, but just requires an extra button push when turning the camera on. Used it to get some great astro photography shots. Review: Meike EFTR-0.71X can be used for Mostly EF lenses only a few EF-S lenses - Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens is good. But it can be used for Mostly EF full frame lenses and a few EF-S crop sensor lenses that I own below. The other EF-S lenses, I cannot even mount them. I wish I use it for all of lenses. Yes - Canon EF 50mm F1.8 Yes - Canon EF 70-210mm F4 Yes - Sigma 18-35mm F1.8 No - Canon EF-S 10-22mm F3.5-F5.6 No - Canon EF-S 18-55mm F3.5-F5.6 No - Canon EF-S 18-135mm F3.5-F5.6 No - Canon EF-S 17-55mm F2.8 ## Features - Use this adapter when mount a EF series lens with Canon RF S35 movie camera or APS-C camera such as EOS R10 - Speedbooster lens mount adapter, can increase the lens 1 f-stop, increasing the amount of light into the virtual background, can better highlight the theme, features electronic contacts, support EF series lens auto focus and vibration compensation. - Mount adapter speed booster, allows the aperture to be increased by one stop while the focal length is reduced (Equivalent Focal Length = Focal Length x 0.71 x 1.6), increasing the lens' 1 f-stop, resulting in better bokeh in photos. - Gasket increase or decrease, after use, if the focus distance does not match after it is used with the lens, you can increase or decrease the gasket adjustment, the gasket needs to be placed flat, otherwise it will affect the picture quality. - The lens mount and camera mount of this adapter is made of metal, makes the item durable, waterdrop resistance and dust resistance, is easy carry when you outdoor shoot, product weight only 166g. ## Technical Specifications | Specification | Value | |---------------|-------| | Best Sellers Rank | #421 in Camera Lens Adapters & Converters | | Customer Reviews | 4.1 out of 5 stars 18 Reviews | ## Images ![Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - Image 1](https://m.media-amazon.com/images/I/61yxGTjkc3L.jpg) ![Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - Image 2](https://m.media-amazon.com/images/I/71ri-QbEUSL.jpg) ![Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - Image 3](https://m.media-amazon.com/images/I/71A7tykEiVL.jpg) ![Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - Image 4](https://m.media-amazon.com/images/I/61BrfJitXAL.jpg) ![Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - Image 5](https://m.media-amazon.com/images/I/61GTswdR2aL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very nice speedring *by L***E on June 1, 2026* Works very well. Gets most of your crop factor back and adds a stop to your lenses. Only issue is camera complains about it not being a standard accessory, but just requires an extra button push when turning the camera on. Used it to get some great astro photography shots. ### ⭐⭐⭐⭐ Meike EFTR-0.71X can be used for Mostly EF lenses only a few EF-S lenses *by S***G on August 10, 2024* Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens is good. But it can be used for Mostly EF full frame lenses and a few EF-S crop sensor lenses that I own below. The other EF-S lenses, I cannot even mount them. I wish I use it for all of lenses. Yes - Canon EF 50mm F1.8 Yes - Canon EF 70-210mm F4 Yes - Sigma 18-35mm F1.8 No - Canon EF-S 10-22mm F3.5-F5.6 No - Canon EF-S 18-55mm F3.5-F5.6 No - Canon EF-S 18-135mm F3.5-F5.6 No - Canon EF-S 17-55mm F2.8 ### ⭐⭐⭐⭐⭐ Funciona súper bien, lo utilizo en fotografía de prensa y sociales *by P***O on April 22, 2026* Perfecto, el foco funciona bien la nitidez también, el único problema es que hay que darle ok siempre que se enciende el equipo ## Frequently Bought Together - Meike EFTR-0.71X Lens Mount Adapter Speed Booster 0.71x Focal Reduction Lens Mount Converter Speedbooster for Canon EF Mount Lenses to Canon APS-C Cameras EOS R7 R10 - Canon EOS R7 Mirrorless Camera (Body Only), Hybrid Camera, 32.5 Megapixel (APS-C) CMOS Sensor, 4K Video, for Sports, Action, Content Creators, Vlogging Camera, Black - SmallRig R7 Cage for Canon R7, Aluminum Alloy R7 cage with Quick Release Plate for Arca Stand, Cold Shoe, NATO Rail and Threaded Holes, Formfitting Camera Cage Video Rig for Canon R7-4003 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/592092482-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0](https://www.desertcart.pt/products/592092482-meike-eftr-0-71x-lens-mount-adapter-speed-booster-0) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-05*